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An automobile accelerates from rest to a speed ]I, under conditions such that no slipping of the driving wheels occurs. From where does the mechanical energy of the car come? In particular, is it true that it is provided by the (static) frictional force exerted by the road on the car?

An automobile accelerates from rest to a speed ]I, under conditions such that no slipping of the driving wheels occurs. From where does the mechanical energy of the car come? In particular, is it true that it is provided by the (static) frictional force exerted by the road on the car?

Grade:upto college level

1 Answers

Deepak Patra
askIITians Faculty 471 Points
8 years ago
The automobile is accelerated by external forces exerted on it by the road. The mechanical energy will come from the friction between the tire and surface of the road. The external frictional force which is exerted on the automobile will give the momentum to the automobile through the tires. Yes, it is true, the mechanical energy is provided by the static frictional force exerted by the road on the car.

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